Calibration tool



FIG. 1 is a top, front and right side perspective view of a calibration tool showing our new design;

FIG. 2 is a bottom, rear and left side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is an enlarged view of a circled part of FIG. 1 .

The dash-dash broken lines shown in the drawing depict portions of the calibration tool in which the design is embodied that form no part of the claimed design.

The dot-dash broken lines disclose enlarged views of the calibration tool that form no part of the claimed design. 

CLAIM The ornamental design for a calibration tool, as shown and described. 